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| author |   Christoph Hellwig <hch@lst.de> | 2019-12-04 09:33:52 -0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-19 10:08:30 +0200 |
| commit | f78e2c36609b61151b1945c7393facbff3dd1ad6 (patch) | |
| tree | 341a17c9a413d450fb7e9484e7ecb3a6a84543fc /include | |
| parent | blk-mq: Swap two calls in blk_mq_exit_queue() (diff) | |
| download | wireguard-linux-f78e2c36609b61151b1945c7393facbff3dd1ad6.tar.xz wireguard-linux-f78e2c36609b61151b1945c7393facbff3dd1ad6.zip | |
iomap: fix sub-page uptodate handling
commit 1cea335d1db1ce6ab71b3d2f94a807112b738a0f upstream.
bio completions can race when a page spans more than one file system
block. Add a spinlock to synchronize marking the page uptodate.
Fixes: 9dc55f1389f9 ("iomap: add support for sub-pagesize buffered I/O without buffer heads")
Reported-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/iomap.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 7aa5d6117936..53b16f104081 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -139,6 +139,7 @@ loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, struct iomap_page { atomic_t read_count; atomic_t write_count; + spinlock_t uptodate_lock; DECLARE_BITMAP(uptodate, PAGE_SIZE / 512); }; |